Here is a thread where I posted some pictures of a Sanden Compressor I found on an old Euro 123 in PNP.
I have the brackets etc to mount it on a 617.962 eng. but the Sanden bracket I have only uses the 2 forward mount holes on the side of the eng block the R-4 uses, not the third rear mount.
The Sanden also mounts on the front of the block just under the vacuum pump, where there is a threaded mount hole that the 617.952 does not have.
I think the eng I pulled the bracket off of was a 617.912.
Alternative compressor and/or mount for the Euro w123
about 4 months ago I found another bracket, this one is made of steel and the one above I listed is made of aluminium.
this second one is mostly there, but does seem to be missing some parts.
Charlie